function checkValidation()
{
	
var obj_all = document.getElementsByTagName("INPUT");
var lastname ="";
for(var i=0;i<obj_all.length;i++){
	//alert(obj_all[i].id);
	if((obj_all[i].type=="radio" || obj_all[i].type=="checkbox")&& obj_all[i].id.indexOf("fx_")==0){
		//alert(i+"--"+obj_all[i].id);
		if(ischecked(obj_all[i]) != true && lastname!=obj_all[i].id ){
			var str=obj_all[i].id.substring(3,obj_all[i].id.length);
			alert( "没有被选中。"+document.getElementById("it_"+str).firstChild.nodeValue);
			lastname=obj_all[i].id;
			return false;
		}
	}else if(obj_all[i].type=="text"&&obj_all[i].id.indexOf("fx_")==0){
		if(obj_all[i].value == null || obj_all[i].value.length<=0){
			var str=obj_all[i].id.substring(3,obj_all[i].id.length);
			alert( " 没有填写。"+ document.getElementById("it_"+str).firstChild.nodeValue);
			return false;
		}
	}
  }
  return true;
}
function ischecked(obj){
	var name = obj.name;
	var fx =(name!=null &&name.length>0)?document.getElementsByName(name):null;
	for(var i=0;fx!=null && i<fx.length;i++){
		if(fx[i].checked==true)
			return true;
	}
	return false;
}


function IdentityCodeValid(code) { 
    var city={11:"北京",12:"天津",13:"河北",14:"山西",15:"内蒙古",21:"辽宁",22:"吉林",23:"黑龙江 ",31:"上海",32:"江苏",33:"浙江",34:"安徽",35:"福建",36:"江西",37:"山东",41:"河南",42:"湖北 ",43:"湖南",44:"广东",45:"广西",46:"海南",50:"重庆",51:"四川",52:"贵州",53:"云南",54:"西藏 ",61:"陕西",62:"甘肃",63:"青海",64:"宁夏",65:"新疆",71:"台湾",81:"香港",82:"澳门",91:"国外 "};
    var tip = "";
    var pass= true;
    
    if(!code || !/^\d{6}(18|19|20)?\d{2}(0[1-9]|1[12])(0[1-9]|[12]\d|3[01])\d{3}(\d|X)$/i.test(code)){
        tip = "身份证号格式错误";
        pass = false;
    }
    
   else if(!city[code.substr(0,2)]){
        tip = "地址编码错误";
        pass = false;
    }
    else{
        //18位身份证需要验证最后一位校验位
        if(code.length == 18){
            code = code.split('');
            //∑(ai×Wi)(mod 11)
            //加权因子
            var factor = [ 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 ];
            //校验位
            var parity = [ 1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2 ];
            var sum = 0;
            var ai = 0;
            var wi = 0;
            for (var i = 0; i < 17; i++)
            {
                ai = code[i];
                wi = factor[i];
                sum += ai * wi;
            }
            var last = parity[sum % 11];
            if(parity[sum % 11] != code[17]){
                tip = "校验位错误";
                pass =false;
            }
        }
    }
    if(!pass) alert(tip);
    return pass;
}

function isNum(obj,msg){
	if(isNaN(obj)){
		alert("“"+msg+"” 请输入数字。");
		return false;
	}
	return true;
}

function isLetter(obj)
{
 string=obj;
 var parent=/^[A-Za-z]+$/;
 if(parent.test(string)) {
 	 return true;
 } else {
 	alert("只能输入英文字母");
 	return false;
 }
}
